As they do not see these as obstacles to be avoided, the solution is to create a contrast effect on the transparent barrier which is visible to birds, who perceive gaps of approximately 10 cm (about the size of your hand) as too small to fly through.

The design is a sophisticated and unsymmetrical pattern that can be used in all directions. Whereas the markings appear as a barrier to birds, the foil still allows good transparency for the human eye.